Automatic fire extinguisher



' April 5, 1932. J. E. CARPENTER ET AL 1,352,074

m'romuxc FIRE EXTINGUISHBR Filed Aug. 6, 1929 g'wua'ntoob -/d///y @Q iAIi/P draw: 07 wary/y Patented Apr. 5, 1932 NEED erase JOHN E. CARPENTERAND CLAUDE S. WHITMAN, OF DENVER, COLORADO, ASSIGNORS T SECURITYMANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATTON OI COLORADOAUTOMATIC FIRE EXTINGUISHER Application filed August 6, 1929. Serial No.388,848.

This invention relates to anautomatic fire extinguisher of the grenadetype and hasv for its principal object the provision of means forsupporting a frangible grenade containing extinguishing liquid incombination with spring actuated means which will effectively operate tobreak the grenade and scatter the extinguishing liquid.

Another object of the invention is to so construct the spring actuatedportion of the device that it will be positively released when subjectedto a predetermined degree of heat.

Other objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and efficiency.These will become more apparent from the following description.

In the following detailed description of the invention reference is hadto the accompanying drawings which form a part hereof. Like numeralsrefer to like parts in all views of the drawings and throughout thedescription.

In the drawings:

Fig. 1 is a front elevation of the invention with the grenade removed.

Fig. 2 is a side elevation of the invention with the grenade in place.

The invention comprises a supporting frame 25 provided with an openingor notch 26 through which a screw or nail can be inserted for attachingthe frame to any desired supporting surface. The frame is constructedfrom a continuous length of metal rod or wire and is preferably formedwith a pointed lower extremity as illustrated.

A grenade loop 27 is hinged at 36 over the top member of the frame 25for supporting a grenade such as indicated at 15. The loop 27 isprovided with hooked extremities 37 which engage the forward face of theframe 25 to maintain the loop 27 in a horizontal position. In packingand shipping the device, the loop 27 may be turned backwardly againstthe frame as illustrated in broken line in Fig. 2.

The grenade may be of any of the usual types formed of relatively thinglass and containing any suitable fire extinguishing liquid.

It is preferably pear shaped as illustrated so that it will fit withinand extend well below the loop 27. A spring rod 28 extends across theframe intermediate its extremities.v

A spring formed of a continuous length of upon the lowermost point ofthefraine 25.

The pointed extremity formed on the frame 25 serves to position thespring arm 33 at the medial line of the frame 25.

In the position of Fig. l, the spring arm33 lies in a slot 84: formed inthe breaking button 32 and its upper extremity is maintained in positionby means of a fusible link35. The link 35 contains two perforations one.of which is slipped, over the extremity of the spring arm 33 and theother of which is slipped over a post 38 extending upwardly from thespring rod 28.

The fusible link 35 may be ofany desired form. As illustrated itcomprises two'sec tions of metal soldered together by means of any ofthe; usual low temperature solders.

When the temperature surrounding the device reaches a point suflicientto melt the solderin the fusible link 35, the two sections of the link'will'releasefrom each other allowing the arm 33 todrop and release thespring loop 31. wardly as indicated'in broken line in Fig. 2, breakingthe grenade and shattering it into fragments. This effectively releasesand scatters the extinguishing liquid.

It will be noted that the spring loop, owing to its wide U-shape,extends completely across the pointed bottom of the grenade. 'It cannot, therefore, fail to strike the grenade and tear away its entirebottom. Thus a complete discharge of the contained liquid is insured.

While a specific form of theimprovement ram orrics Between the coils 29the The spring loop then snaps up has been described and illustratedherein it be varied, within the scope of the appended claims, withoutdeparting from the spirit of the invention. v

, Having thus described the invention, what is claimed and desiredsecured by Letters Patent is a m V 1'. An automatic fire extinguishercomprising: a frame wire bent to form the periphery of a supportingframe; a pointed lower exitremity on said frame wire; a bracketextending outwardly adjacent the upper extremity of said frame wire; agrenade supported in said bracket; a spring rod extending across saidframe Wire intermediate itsextremities; a coil spring surrounding saidrod and having'its ends fixed a loop formed on said coil spring andarranged to break said grenade;

.a s rin' armhin ed at its one extremit to b b v. a

the pointed extremity'ofsaid frame wire and adapted to extend upwardlyso as to normally hold said loop under stress over said pointedextremity; a projection formed on said s'pring'md and a fusible linkextending from" said projection" to the other extremity of said springarm-so that when said link is fused said arm will release said loop andallow itto swing upwardly and strike said grenade; V v

2. In an automatic fire extinguisher havinga frame and a? springimpelled striker arranged to break a grenade mounted on said frame; aspring arm hinged at its one ex} tremity on said frame and adapted toextend over said striker so as to hold it normally out of contact withsaidgrena'de and under.

ing itsend's' fixed a loop formed on saidcoil' spring and arranged tobreak said grenade;

a spring arm hinged at its one extremity to the pointed extremity ofsaid frame wire and adapted to extend upwardly so as to nor mally holdsaid loop under stress; a project'ion formed on said spring rod andafusible ing: a wire'suppo'rting frame; a bracket ex tending outwardlyadjacent the upper 'extremity of said frame; a grenade supported in saidbracket; a. spring rod extending across said frame intermediateits'extremities; a

coil spring surrounding saidrod andhaving ItS' ends fixed; a loop'formed on sa d coil spring and arranged to break saidgrenade;

a spring arm hingedly supported by said 7 frame and adapted to extendover said loop,

50 asto normally holdsaid loop under stress;

and a fusible link fixed at its one extremity V tures. r V 7 JOHNCARPENTER; CLAUDE S. WHITMAN.

